My goal is very simple I just want to round a number by 3 significant figures
for example if the user inputs:
655900 433.72
rounding it to 3 significant figures should look like :
656000 434
Asked
Active
Viewed 56 times
0
Andy
- 3
- 2
-
1What have you already tried? – Alex Shirley Nov 10 '20 at 09:58
-
`std::round` is for rounding. Once you know how to round to integer you can also round `x * 100` and divide the result by `100` – 463035818_is_not_an_ai Nov 10 '20 at 10:00
-
Maybe [[c++] round digits](https://stackoverflow.com/search?q=%5Bc%2B%2B%5D+round+digits) – Olaf Dietsche Nov 10 '20 at 10:02
-
1Is this just for output (like `cout` or `printf`) or do you need to store the rounded floating point number? – Paul Floyd Nov 10 '20 at 10:02
-
@Paul Floyd its for cout – Andy Nov 10 '20 at 10:26
-
Have you tried std::setprecision https://en.cppreference.com/w/cpp/io/manip/setprecision ? – Paul Floyd Nov 10 '20 at 10:31